Apt-update error: Key is stored in legacy trusted.gpg keyring

Sonarr version (exact version):
Mono version (if Sonarr is not running on Windows):
OS: Ubuntu 22.04
Debug logs:
Description of issue: after upgrade apt-update throws the following error

https://apt.sonarr.tv/ubuntu/dists/focal/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.

This appears to be how the repo is configured on your system, not an issue with the Sonarr repo/package.

Perhaps the instructions should be updated for Ubuntu?

[0] % sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 2009837CBFFD68F45BC180471F4F90DE2A9B4BF8
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).